Refrigeration unit



Oct. 2l', 1930.v F. E'. DENNlsoN 1,778,825

REFRIGERATION UNIT Filed Aug. 4, 1927 773g@ J7 JQ FRENCH n.rinnivivrsciv, or' BELOI'I, WISCONSIN, vAssieivon 'roy NATIONALvnnrrtrernitnT :1,7iaaz5 rrIoN conroaiifrioiv, or BELoIr, WIsooiisIN; aconroaarioii on DELAWARE vmiritrerniari'iioii UNIT 'Appii'ation siedAugust 4,1927; 'senai'iniaidsisffv This, invention relates tofrefrigeratingg. apparatus and aims to provide an efficient unit for suchan apparatus. lhile the unit i l .system in the upper portion of thecounter,

for example as shown'by the position ofthe':

of this invention is more particularly adapted kforuse asaii'evaporating unit, it'isv to be'A understood that it can also be usedas a condensing unit;y i

kRefrigeration units suchv as the evaporat` ing unit used forcoolingishowc-ases and the like have usually been installed in the lowerportion or rear ofthe showcase or counter.

I have found that the most advantageous place to install the unit in thecounter or refrigeration compartment is in: the upper. part thereof inorder that the compartmentmay be more uniformly cooled. l

ne of the principal difficulties which I encountered in providing c aunit which Yis adapted a tion of the counter was the fact that theordinary units for this purpose took up too much space. i

It is also another. object of this invention to provide a refrigeratormore particularly mOUIltedlabrupt. so as'tofoffer excessive resistanceto lthe flow of refrigeratingniediumltheretion lwill be apparent asthesame becomes better understood from an examinationbf' thespecification and claims in connection with the accompanying drawings,wherein Fig. 1 is a fragmentary vertical section of a refrigeratiiigcounter provided with a re-V frigerationunit, A l y Fig. 2 is anenlarged fragmentary plan view of a refrigeration unit removed 4from thecounter and Y Fig. 3 is an enlargedfragmentary section#` al view takenat the line 3 3 inFig.` 1.

Referring to the drawings more particu.

larly, numeral 4f represents the interior of l jdifferent lengths sothat the bend 10y of" one n Y i coil will be disposed within the bend20'of its ly warm air, it is bound tosettle inthe couni to be installedin the upper Spor-1,

to uniformly cool ter andthe most uniform cooling effect within thecounter is'obtained by mountir'i'gthe evapf orating vunit of a closedcircuit y refrigeration unit represented generallybynumeral v6 vinFig- 1. ,'This unit consists of two headers 7 and 8 respectively mountedinfjuxtaposed're- Yis connectedby means of the ypipe y9 to receiverefrigerant from the system andthe upper one numberS is connect'ed'bymeans of a pipe 11 tolthe'sucti'onside of the compres-^ sor inthe.circuit.. The'lower header 7 is con-r nected to the inletvends ofthelower portions 12 ofa seriesof expansion coils orpipes and theupperheader 8 is connected tothe zoutlet :ends ofthe'jupperportions-13 ofsaid/pipes;-

`The two .portions of said series kof pipes-are f,

so connected together at :their ends remote o ccu-py a minimumjof space,and at the same time present a gradual turn which will not be through..

Weregthe, upper portion of reach pipe orcoil 'disposed directly abovethe lower portion, i

the ben'd in'the pipe connecting the twoportions would be so shortthat-the bent por' tion off the vpipewoiild' be flattened in Y the'bendingvoperation and furthermore thebend would'be so abrupt that itwould imposeexcessivefriction upon the iiowing refrigerant therebydiminishing the efficiency oftheinachine. To obviate this objection,Vthe, bentportion offeachrpifpe is'positioned at an angle substantiallyparallel and horizontal 'and are to. the'ver'ticalso thatthe upperportion of one pipeis disposed-over ther lower portion of an- Y otherpipe aswill-.be apparentfrom Figs. 1

and.2 .v In'order to permit thisfdisposition of the pipes, thericoils-ofeach pairarer made of companioncoil. lWhile this is the preferredA:arrangement, the `bends `if desired may''obf viouslybe madeV stilllonger so that the upperV portion of one coil' extends'laterally beyondtheV lower portion of its companion coil 1n which instance the upper andlower .portions of companion coils would not be disposed in Verticalalignmentand if desired ,the bend might be made Vsuiiciently longsorthat theY upperportion of one coil would overliethe lower portion ofthe second coil atV one side.

Afunit constructed as above Vdescribed pos`- sessestheadvantage that itisof minimums depth rfrom top to bottom so that itoccupies a minimum ofspace in the-counter while at the same time the bends `in the `coilsVare notso abruptV as to interfere l"with the 'circulationv of i ftherefrigerant. Furthermorefby providing a unit, the depth of which ,isonly slightly greater `than the :diameter-of; two pipes, the

y collectionand formation of frost upon the lowerfpip'es supon thedefrosting oi the upper-y jpipes isgreduced to a minimum, whereas 1nunitsfin which several pipes are superposed one labove theother, thelowermost pipe collects the drippings from the `upper pipesand alwayscarries considerable frost whichlinterferes" wit-hthe transference 4ofheat units Aand `correspondingly decreases the etliciency ofthe unit.

.. pended' by hooks counter.

The unitV may be very conveniently supported by means of ktransversebars 14 sus- 15 connected to fthetop ofthe A cork pan 16 `issuspendedjfrom beneath pipes. :This which -may drop fromth'epipesfof'the unit. As shown in Fig. 1,'the 'pan :t6-is slightlyinclinedand provided withan outletl'S in Aits lower side and any moistureflowing from the outletV 18 is .adapted to be caught in a dripVano-ther. 1

fformed into a straight legged Usshaped loop withV its inletand'outlet-endsconnected respectively to the inlet and outlet headers,the 'middleportionof each coil beinglcurved inV an: approximate.ll-shapealigned so .that a plane passing through the centerline'of the lJ-shapedportion oflthe pipe lies out of perpendicular with the longitudinalaXesof said headers, the center4 lines ofthe connections of said coils'and-'headers being too" near Vearch other to lpermit of Vformin g thepipe coils into straight legged U-shapeswith legsas' Vclose togetherl assaidcenter lines ar'ew'vithout flattening ofthe coils'in said loops,theV plane of one of said Lpipe coils intersecting the plane of "Inwitnessfof the foregoing I aflixm'y signature. Y

' FRENCH E. DENN ISON.

the unitby means. of hooks 17 carried bythe pan isadapted-tocol'lectmoisture cup carried on a `bracketQl mounted inside of the "counter, yThe drip pan 16 4 sists in the circulation ofthe air, thefair pass-` ingdownwardly to j .ll-toward `the lower portion of the counter and beneathYlongitudinal laxes of l andfoutlet ends of each l'oopbeingconnected Y pheaders points which areSpacedzlongitudinallywith'respect to each yother onztheifr respective headers,'lone U- V- 'respectively to said:thjecomparatively warm' air flowingupwardly Y the p'anan'dl around' theleft edge,"V

thereof to the top of the counter.

Iam aware thatmany changes mayb emadel `without' departing from theprinciples of this Y invention.`

therefore do not `wish to belimited'tothevde'ta-ils shown V,ordescribed.

Iclaim 1 byits inclination alsoias Y the right as viewed-in Fig. Y

1.- A refrigerating coil unit comprising an vi inlet headerl and anoutlet header lying alongside, approximately contiguous and parallelofeach loop beingk out said headers, the inlet Vthereto,"and faplurality of pipe'fcoils each 'f formed as generally' U-shapedloops,`the plane of perpendicular tothe

